/Engine/Source/Runtime/Engine/Public/MaterialHLSLGenerator.h
const [UE::HLSLTree::FExpression](API\Runtime\Engine\HLSLTree\FExpression) * AcquireFunctionInputExpression ( [UE::HLSLTree::FScope](API\Runtime\Engine\HLSLTree\FScope) & Scope, const [UMaterialExpressionFunctionInput](API\Runtime\Engine\Materials\UMaterialExpressionFunctionInput) * MaterialExpression )